radio install

i took the cd player out of my sentra to put in my 95 civic. i installed it into the sentra myself and it worked fine. i bought a wiring harness and hooked it up, but it didnt work, so i thought the radio might be broken because my sentra was sitting in the driveway for a few months and it was getting really hot in there with the windows up. so i went to best buy and bought a new one. this time i got a pioneer, but i bought one that had been returned. the salesman said it still worked fine. it doesnt work. am i doing anyhting wrong? is there something special you have to do when installing a radio on a civic? the stock radio still works fine, but if i turn the car off the channels get reset. could there be something wrong with the memory wire? if there is, how do i go about rewiring it? or are just both my radios dead?

It could be that you have a blown fuse. the fuse for the memory is under the hood. the fuse for the acc. is under the dash, on the drivers side. i am guessing that none of the radios where damaged.it could have been the fuse the whole time.use a test light and check for energy going to the radio. the yellow should always have power and the red should only have power when you turn the key.

i wsa right about the yellow wire. it involved me drilling the firewal and runnin ga new one. quite a bitch but i always liked working on cars. its strange that the aftermarket radios wouldnt turn on without the memory wire. the stock radio worked fine just didnt remember anything.

Good im glad it worked out .